Struct SyntaxContextData

pub struct SyntaxContextData {
    pub outer_expn: Option<MacroCallId>,
    pub outer_transparency: Transparency,
    pub parent: SyntaxContextId,
    pub opaque: SyntaxContextId,
    pub opaque_and_semitransparent: SyntaxContextId,
}

A syntax context describes a hierarchy tracking order of macro definitions.

Fields

outer_expn: Option<MacroCallId>

Invariant: Only SyntaxContextId::ROOT has a None outer expansion.

outer_transparency: Transparency

parent: SyntaxContextId

opaque: SyntaxContextId

This context, but with all transparent and semi-transparent expansions filtered away.

opaque_and_semitransparent: SyntaxContextId

This context, but with all transparent expansions filtered away.

Implementations

impl SyntaxContextData

pub fn root() -> Self

Trait Implementations

impl Clone for SyntaxContextData

fn clone(&self) -> SyntaxContextData

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SyntaxContextData

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for SyntaxContextData

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl InternValue for SyntaxContextData

type Key = (SyntaxContextId, Option<MacroCallId>, Transparency)

They key used to intern this value by.

fn into_key(&self) -> Self::Key

Maps the value to a key that will be used to intern it.

fn with_key<F, T>(&self, f: F) -> T

where F: FnOnce(&Self::Key) -> T,

Calls the given function with the key that was used to intern this value.

impl PartialEq for SyntaxContextData

fn eq(&self, other: &SyntaxContextData) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for SyntaxContextData

impl Eq for SyntaxContextData

impl StructuralPartialEq for SyntaxContextData